CATALYST FOR DEHYDRATION OF ALCYLAROMATIC HYDROCARBONS Russian patent published in 2008 - IPC B01J37/04 B01J23/78 B01J23/745 B01J23/88 B01J23/84 B01J21/06 C07C5/32 

FIELD: chemistry.

SUBSTANCE: catalyst for dehydration of alcylaromatic hydrocarbons containing oxides of iron, alkaline-earth metals, cerium (4), molybdenum, titanium and/or vanadium and potassium is described. The diffraction pattern of said catalyst contains reflexes of potassium polyferrite and hematite phase related to iron (3) oxide in α-form. The relative intensities of said reflexes are (1÷40) and 100% respectively. Catalyst component ratio may be as follows: potassium oxide 5-30 Wt%; oxides of alkaline-earth metals 1-10 Wt%; cerium (4) oxide 5÷20 Wt%; molybdenum oxide 0.2-5 Wt%; titanium and/or vanadium oxide 0.2-5 Wt%; iron (3) oxide - the rest. Additionally catalyst can contain up to 30 Wt% of rubidium oxide and/or cesium oxide. The catalyst is prepared by calcinating at temperatures 500-750°C during 1-3 hr and 800-900°C during 0.5-1.5 hr. Bulk density of catalyst is in the range 0.95-1.5g/sm².

EFFECT: development of catalyst providing high conversion and selectivity in relation of end products in the process of alcylaromatic hydrocarbons dehydration; increasing of catalyst service cycle.

5 cl, 1 tbl, 15 ex